Prefix overview
Phone numbers in prefix 203-400
This page covers the 203-400 prefix in the United States. It shows where numbers come from, which carrier is linked to the range, and how this block is structured.
If you are looking for a specific number, you can continue to its dedicated phone page. Otherwise, this page helps you understand the broader number block behind it.
PREFIX
203-400
RATE CENTER
TRUMBULL
CARRIER
NEW CINGULAR WIRELESS PCS, LLC - DC
CT
Prefix range
The prefix 203-400 includes numbers from 2034000000 to 2034009999.
This range is associated with the TRUMBULL rate center and was originally assigned to NEW CINGULAR WIRELESS PCS, LLC - DC.
Numbers in this prefix
20 numbers